P204萃取硫酸体系中V(IV)的性能研究

冯雪茹; 吕国志; 张廷安; 赵秋月

doi:10.7513/j.issn.1004-7638.2022.06.001

P204萃取硫酸体系中V(IV)的性能研究

doi: 10.7513/j.issn.1004-7638.2022.06.001

1.
中国地质科学院矿产综合利用研究所, 四川成都 610041
2.
东北大学冶金学院, 辽宁沈阳 110819

基金项目: 国家863计划资助项目（2012AA062303）；地质调查项目（DD20189501）。

详细信息

作者简介:
冯雪茹，1990年出生，女，四川德阳人，硕士研究生，工程师，主要从事冶金及材料研究，E-mail： 517234837@qq.com

中图分类号: TF841.3
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- 被引次数: 0
出版历程
- 收稿日期: 2022-09-12
- 刊出日期: 2023-01-13

Study on the extraction performance of V(IV) by P204 in sulfuric acid system

1.
Institute of Multipurpose Utilization of Mineral Resources, CAGS, Chengdu 610041, Sichuan, China
2.
School of Metallurgy, Northeastern University, Shenyang 110819, Liaoning, China

摘要

摘要: 以钛白废酸无焙烧直接加压酸浸提钒新技术中得到的浸出液为研究对象。配制硫酸体系中的V(IV)溶液，进行萃取单因素试验以研究P204对V(IV)的萃取性能。通过考察水相初始pH值、萃取剂P204用量、萃取相比(O/A)、振荡时间等因素对萃取的影响，得到不同浓度V(IV)溶液的适宜萃取条件，并初步探究了萃取剂P204对V(IV)的萃取饱和容量和萃取机理。结果表明: 萃取物V(IV)溶液的浓度影响水相初始pH值和萃取剂P204用量的选择，但对振荡时间和萃取相比（O/A）无影响；P204对硫酸体系中V(IV)的萃取性能优良，萃取速度快，饱和容量大；对于1、10、30 g/L的V(IV)溶液，在适宜萃取条件下，单级萃取率分别为90.36%、90.27%、61.37%。
- V(IV) /
- 硫酸体系 /
- 萃取 /
- P204 /
- 饱和容量
Abstract: The leaching solution was taken as the research object which was obtained from the new process for vanadium production by acid leaching with titanium white waste acid under the pressure without roasting. V(IV) solution in sulfuric acid system was prepared to study on the extraction performance of V(IV) by P204 using single factor tests. The effects of initial pH value of aqueous phase, amount of extractant P204, extraction ratio (O/A)and the shaking time on the extraction were investigated to obtain the optimum extraction conditions of different concentrations of V(IV) solution. The saturation capacity of P204 and extraction mechanism of V(IV) were preliminarily studied. The results show that the concentration of V(IV) solution affects the initial pH value of aqueous phase and the amount of extractant P204, but has no effect on the shaking time and extraction ratio (O/A). P204 has an excellent extraction performance, fast extraction speed and large saturation capacity for V(IV) in sulfuric acid system. For the V(IV) solutions of 1, 10 g/L and 30 g/L, the single-stage extraction rates are 90.36%, 90.27% and 61.37%, respectively, under the suitable extraction conditions.
- V(IV) /
- sulfuric acid system /
- extraction /
- P204 /
- saturation capacity

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图 1 水相初始pH值对不同浓度V(IV)萃取率的影响

Figure 1. Effect of initial pH of aqueous phase on the extraction rates of V(Ⅳ) with different concentrations

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图 2 P204的用量对不同浓度V(IV)萃取率的影响

Figure 2. Effect of the dosage of P204 on the extraction rates of V(Ⅳ) with different concentrations

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图 3 萃取相比对不同浓度V(IV)萃取率的影响

Figure 3. Effect of extraction ratio (O/A) on the extraction rates of V(IV) with different concentrations

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图 4 振荡时间对不同浓度V(IV)萃取率的影响

Figure 4. Effect of shaking time on the extraction rates of V(Ⅳ) with different concentrations

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图 5 萃取平衡等温线

Figure 5. Extraction equilibrium isotherms

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图 6 lg(H₂A₂)与lgD-2 pH的关系

Figure 6. Relationship between lg (H₂A₂) and lgD-2pH

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表 1 系列相比法测定结果

Table 1. Analysis results of series phases ratio method

相比(O/A) 有机相V(IV)浓度/(g·L⁻¹)

10∶1 0.89
5∶1 1.75
3∶1 2.85
2∶1 4.07
1∶1 7.66
1∶2 13.24
1∶3 15.66
1∶5 16.37
1∶10 16.33

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